TEKS 8.7A model and illustrate how the tilted Earth rotates on its axis, causing day and night, and revolves around the Sun causing changes in seasons
1. The Earth in Space a. The Earth rotates around an axis. b. The rotational axis is tilted to 23.4
2. Rotation o c. The Earth revolves around the Sun. a. The Earth rotates on its axis once every 24 hours. b. The direction of rotation direction is
counterclockwise (west to east) if you are
Earth from above the North Pole. c. Earth’s rotation results in…..
 day and night
sunrise and sunset.
147,000,000 km
152,000,000 km axis viewing

2. Revolution a. The Earth revolves around the Sun once every 365 ¼ days, which is equal to 1 year on Earth. b. The path around the Sun, or orbit, is not a circle.

The shortest distance between the Earth and Sun is about

147,000,000 km and occurs in January.
The furthest distance between the Earth and Sun is about
152,000,000 km and occurs in July. c. The average distance from the Earth to the Sun is called an
astronomical unit (AU). This is about 150,000,000 kilometers.

TEKS 8.7A model and illustrate how the tilted Earth rotates on its axis, causing day and night, and revolves around the Sun causing changes in seasons
Rotation on an axis
1. The Earth in Space a. The Earth rotates around an _______. sun Revolution around
Sun axis b. The rotational axis is tilted to _______ c. The Earth __________ around the sun.
2. Rotation a. The Earth ______ on its axis once every _________. b. The direction of rotation direction is _________________ (west to east) if you are viewing Earth from above the North Pole. c. Earth’s rotation results in…..
 _________________
 _________________
2. Revolution a. The Earth revolves around the Sun once every
______________, which is equal to 1 year on Earth. b. The path around the Sun, or orbit, is _____ a circle.

The ________ distance between the Earth and is about 147,000,000 km occurs in
____________.
147,000,000 km
152,000,000 km

The _________ distance between the Earth and is about 152,000,000 km occurs in ________.
Sun and
Sun and c. The average distance from the
Earth to the Sun is called an ______________________ (AU). This is about
150,000,000 kilometers.

TEKS 8.7A model and illustrate how the tilted Earth rotates on its axis, causing day and night, and revolves around the Sun causing changes in seasons
1. Reasons for the Seasons a. The ____________ of the Earth on its axis. b. The hemisphere tilted ___________ the Sun receives _______________ radiation. This season is _____________. c. The hemisphere tilted ____________ from the Sun receives _______ radiant energy. This season is ___________.
2. Points in Earth’s orbit around the Sun a. June 21, 22: ____________ Solstice

The Sun reaches its highest point in the sky.

The length of daylight hours are the _____________. b. December 21, 22: _________ Solstice

The Sun reaches its lowest point in the sky.

The length of daylight hours are the ______________. c. March 21-23 _________ Equinox and September 21-23 ________ Equinox:

Earth is ___________________ toward or away from the Sun. Each hemisphere receives similar amounts of radiant energy.

The length of daylight and nighttime hours are __________.

TEKS 8.7A model and illustrate how the tilted Earth rotates on its axis, causing day and night, and revolves around the Sun causing changes in seasons
1. Reasons for the Seasons a. The 23.4 O tilt of the Earth on its axis. b. The hemisphere tilted toward the Sun receives more direct radiation. This season is summer. c. The hemisphere tilted away from the Sun receives less radiant energy. This season is winter.
2. Points in Earth’s orbit around the Sun a. June 21, 22: Summer Solstice

The Sun reaches its highest point in the sky.

The length of daylight hours are the longest. b. December 21, 22: Winter Solstice

The Sun reaches its lowest point in the sky.

The length of daylight hours are the shortest. c. March 21-23 Spring Equinox and September 21-23 Fall Equinox:

Earth is not tilted toward or away from the Sun. Each hemisphere receives similar amounts of radiant energy.

The length of daylight and nighttime hours are equal.